Make the platform responsible to create the buildenv.

It is now the platform who is responsible to:
- correctly add the toolchains as needed
- setup the cross environment
- create the cross files.

kiwixbuild/platforms/win32.py

@@ -1,13 +1,21 @@
+import subprocess
+
 from .base import PlatformInfo
+from kiwixbuild.utils import which, pj
+from kiwixbuild._global import neutralEnv
 
 
 class Win32PlatformInfo(PlatformInfo):
     extra_libs = ['-lwinmm', '-lws2_32', '-lshlwapi', '-lrpcrt4', '-lmsvcr90', '-liphlpapi']
+    arch_full = 'i686-w64-mingw32'
     def __init__(self, name, static):
-        super().__init__(name, 'win32', static, ['mingw32_toolchain'], ['fedora', 'debian'])
+        super().__init__(name, 'win32', static, [], ['fedora', 'debian'])
 
     def get_cross_config(self):
         return {
+            'exec_wrapper_def': self.exec_wrapper_def,
+            'binaries': self.binaries,
+            'root_path': self.root_path,
             'extra_libs': self.extra_libs,
             'extra_cflags': ['-DWIN32'],
             'host_machine': {
@@ -20,5 +28,53 @@ class Win32PlatformInfo(PlatformInfo):
             }
         }
 
+    def finalize_setup(self):
+        super().finalize_setup()
+        self.buildEnv.cmake_crossfile = self._gen_crossfile('cmake_cross_file.txt')
+        self.buildEnv.meson_crossfile = self._gen_crossfile('meson_cross_file.txt')
+
+    @property
+    def root_path(self):
+        root_paths = {
+            'fedora': '/usr/i686-w64-mingw32/sys-root/mingw',
+            'debian': '/usr/i686-w64-mingw32'
+        }
+        return root_paths[neutralEnv('distname')]
+
+    @property
+    def binaries(self):
+        return {k:which('{}-{}'.format(self.arch_full, v))
+                for k, v in (('CC', 'gcc'),
+                             ('CXX', 'g++'),
+                             ('AR', 'ar'),
+                             ('STRIP', 'strip'),
+                             ('WINDRES', 'windres'),
+                             ('RANLIB', 'ranlib'))
+               }
+
+    @property
+    def exec_wrapper_def(self):
+        try:
+            which('wine')
+        except subprocess.CalledProcessError:
+            return ""
+        else:
+            return "exec_wrapper = 'wine'"
+
+    @property
+    def configure_option(self):
+        return '--host={}'.format(self.arch_full)
+
+    def set_compiler(self, env):
+        for k, v in self.binaries.items():
+            env[k] = v
+
+    def get_bin_dir(self):
+        return [pj(self.root_path, 'bin')]
+
+    def set_env(self, env):
+        env['PKG_CONFIG_LIBDIR'] = pj(self.root_path, 'lib', 'pkgconfig')
+        env['LIBS'] = " ".join(self.extra_libs) + " " +env['LIBS']
+
 Win32PlatformInfo('win32_dyn', False)
 Win32PlatformInfo('win32_static', True)